Sale

Exterior Components› Body Panels and Components

Wehrli

Wehrli 99-23 GM Billet Coolant Heater Core Firewall Fitting

$42.00 $40.74 Save $1.26

SKU: W005 WCF100155

In Stock
In Stock
Ships by Aug 3
Free Shipping over $100
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

Part #: WCF100155

The factory plastic GM Coolant Heater Core Firewall Fitting is a common failure point on Duramax trucks and other GM vehicles. Our made in the USA, billet aluminum direct-fit replacement is more resistant to heat and vibration. Prevent leaks with this easy to install upgrade. Replaces GM/AC Delco Part Number 15032062

Wehrli Custom Fab Fitting Kit, GM Heater Core Quick Connect, Straight, Billet

MIA's Description

The Wehrli WCF100155 is a billet aluminum coolant heater core firewall fitting designed as a direct-fit replacement for the factory plastic GM fitting. It is more resistant to heat and vibration, and features a double O-ring seal to prevent leaks. This fitting has a 5/8" barb connection and a clear anodized finish to resist corrosion. It replaces GM/AC Delco Part Number 15032062 and Dorman Part Number 800-409.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandWehrli
Part NumberW005 WCF100155

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy